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William Blair & Company

William Blair & Company Portfolio holdings

AUM $38.4B
1-Year Est. Return 25.71%
This Fund
S&P 500
This Quarter Est. Return
+2.39%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+665.86%
AUM
$26.5B
AUM Growth
-$769M
Cap. Flow
-$1.09B
Cap. Flow %
-4.11%
Top 10 Hldgs %
22.54%
Holding
1,941
New
123
Increased
715
Reduced
742
Closed
84

Top Buys

Rank Stock Value
1
KMX icon
CarMax
KMX
+$73M
2
OSH
Oak Street Health, Inc.
OSH
+$60.6M
3
IRTC icon
iRhythm Holdings
IRTC
+$51.2M
4
DXCM icon
DexCom
DXCM
+$39.4M
5
AON icon
Aon
AON
+$30.5M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$449M
2
VUG icon
Vanguard Morningstar Growth ETF
VUG
+$271M
3
AMZN icon
Amazon
AMZN
+$157M
4
MSFT icon
Microsoft
MSFT
+$83.3M
5
GOOG icon
Alphabet (Google) Class C
GOOG
+$78.4M

Sector Composition

Rank Sector Weight
1 Technology 25.67%
2 Healthcare 19.26%
3 Financials 11.68%
4 Consumer Discretionary 10.53%
5 Industrials 9.66%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
JXI icon
1751
iShares Global Utilities ETF
JXI
$307M
$11K ﹤0.01%
190
– –
SCHC icon
1752
Schwab International Small-Cap Equity ETF
SCHC
$5.67B
$11K ﹤0.01%
288
-652
-69% -$25.4K
UPRO icon
1753
ProShares UltraPro S&P 500
UPRO
$5.74B
$11K ﹤0.01%
250
– –
VCLT icon
1754
Vanguard Long-Term Corporate Bond ETF
VCLT
$8.75B
$11K ﹤0.01%
+107
New +$11.2K
WIP icon
1755
State Street SPDR FTSE International Government Inflation-Protected Bond ETF
WIP
$474M
$11K ﹤0.01%
200
-200
-50% -$11.5K
CYB
1756
DELISTED
WisdomTree Chinese Yuan Strategy Fund
CYB
$11K ﹤0.01%
400
– –
SLY
1757
DELISTED
SPDR S&P 600 Small Cap ETF (based on S&P SmallCap 600 Index--symbol SML)
SLY
$11K ﹤0.01%
120
-200
-63% -$18.1K
EBND icon
1758
State Street SPDR Bloomberg Emerging Markets Local Bond ETF
EBND
$2.27B
$10K ﹤0.01%
372
+2
+0.5% +$54
GXC icon
1759
State Street SPDR S&P China ETF
GXC
$474M
$10K ﹤0.01%
75
– –
IYT icon
1760
iShares US Transportation ETF
IYT
$2.27B
$10K ﹤0.01%
148
-4
-3% -$235
RXI icon
1761
iShares Global Consumer Discretionary ETF
RXI
$274M
$10K ﹤0.01%
+60
New +$9.69K
SIL icon
1762
Global X Silver Miners ETF NEW
SIL
$4.89B
$10K ﹤0.01%
259
+39
+18% +$1.68K
WTPI
1763
WisdomTree Equity Premium Income Fund
WTPI
$503M
$10K ﹤0.01%
344
– –
BATRA icon
1764
Atlanta Braves Holdings Series A
BATRA
$3.63B
$9K ﹤0.01%
300
-5
-2% -$144
ELD icon
1765
WisdomTree Emerging Markets Local Debt Fund
ELD
$143M
$9K ﹤0.01%
297
+1
+0.3% +$34
PKW icon
1766
Invesco BuyBack Achievers ETF
PKW
$1.78B
$9K ﹤0.01%
+108
New +$8.56K
PSR icon
1767
Invesco Active US Real Estate Fund
PSR
$59.2M
$9K ﹤0.01%
94
-92
-49% -$8.21K
USLB
1768
DELISTED
Invesco Russell 1000 Low Beta Equal Weight ETF
USLB
$9K ﹤0.01%
250
– –
IGE icon
1769
iShares North American Natural Resources ETF
IGE
$786M
$8K ﹤0.01%
283
– –
SLVP icon
1770
iShares MSCI Global Silver and Metals Miners ETF
SLVP
$976M
$8K ﹤0.01%
552
– –
TIPX icon
1771
State Street SPDR Bloomberg 1-10 Year TIPS ETF
TIPX
$2.04B
$8K ﹤0.01%
+400
New +$8.37K
WCLD
1772
WisdomTree Cloud Computing Fund
WCLD
$302M
$8K ﹤0.01%
+173
New +$9.25K
WTV icon
1773
WisdomTree US Value Fund
WTV
$3.36B
$8K ﹤0.01%
144
-1,144
-89% -$61.2K
AAWW
1774
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
$8K ﹤0.01%
136
-41
-23% -$2.29K
DFE icon
1775
WisdomTree Europe SmallCap Dividend Fund
DFE
$168M
$7K ﹤0.01%
95
– –
69 70
71
72 73

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William Blair & Company's Q1 2021 Portfolio in Review

As of Q1 2021, William Blair & Company held 1,941 positions worth $26.5B, down 2.8% from $27.3B the previous quarter. Its ten largest holdings account for 23% of the portfolio.

William Blair & Company withdrew a net $1.09B in Q1 2021, closing 84 positions and reducing 742 holdings. Its most notable exit was HMS Holdings Corp., an estimated $7.64M position sold in full.

By sector, the portfolio is most concentrated in Technology at 26% of assets, down from 28% a quarter earlier, followed by Healthcare and Financials.

Against the trend, William Blair & Company opened a new position in Oak Street Health, Inc. worth $59.1M.

  • William Blair & Company's largest Q1 2021 buy was Oak Street Health, Inc.: 1,089,318 shares worth $59.1M.
  • William Blair & Company added most to CarMax in Q1 2021, an estimated $73M increase.
  • William Blair & Company's biggest Q1 2021 reduction was Apple, cutting an estimated $449M.
  • William Blair & Company fully exited HMS Holdings Corp. in Q1 2021, selling an estimated $7.64M.
  • William Blair & Company's ten largest holdings make up 23% of its $26.5B portfolio in Q1 2021.
  • William Blair & Company opened 123 new positions and closed 84 in Q1 2021.
  • William Blair & Company's portfolio value fell 2.8% quarter-over-quarter to $26.5B.

Based on William Blair & Company's 13F filing for Q1 2021, filed 13 May 2021.